Why is it essential to understand the function of each of the skin's layers?

Understanding the function of each of the skin's layers is crucial for selecting appropriate products and treatments. The skin consists of several layers, each with distinct characteristics and functions. For instance, the epidermis serves as the primary barrier to protect against environmental damage and water loss, while the dermis contains blood vessels, nerves, and connective tissue, playing a key role in skin health and resilience. Knowledge of these functions enables a cosmetologist to determine which products will be most effective for specific skin types and conditions. This can include selecting moisturizers, exfoliants, or treatments for issues such as acne or aging, ensuring that clients receive tailored care that addresses their unique needs.